15591336972 has 24 divisors (see below), whose sum is σ = 36481132800. Its totient is φ = 5182634256.

The previous prime is 15591336967. The next prime is 15591336979. The reversal of 15591336972 is 27963319551.

It is not an unprimeable number, because it can be changed into a prime (15591336979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1805272 + ... + 1813887.

It is an arithmetic number, because the mean of its divisors is an integer number (1520047200).

Almost surely, 2^15591336972 is an apocalyptic number.

15591336972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15591336972 is an abundant number, since it is smaller than the sum of its proper divisors (20889795828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15591336972 is a wasteful number, since it uses less digits than its factorization.

15591336972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3619525 (or 3619523 counting only the distinct ones).

The product of its digits is 1530900, while the sum is 51.

The spelling of 15591336972 in words is "fifteen billion, five hundred ninety-one million, three hundred thirty-six thousand, nine hundred seventy-two".